<!--  -->
<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色区域 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', 'vcenter', i1 === 0 ? 'bdtop' : '']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable
                      @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环 嵌套渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <!-- 渲染二级权限 -->
                  <el-col :span="6">
                    <el-tag type="success" closable
                      @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 渲染三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      v-for="(item3, i3) in item2.children"
                      :key="item3.id" 
                      type="warning"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>{{scope.row}}</pre> -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              width="300px"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
    data() {
        return {
            //所有角色列表数据
            rolelist: [],
            // 控制分配权限对话框的显示和隐藏
            setRightDialogVisible: false,
            // 所有权限数据
            rightslist:[],
            // 树型控件的属性绑定对象
            treeProps: {
              label: 'authName',
              children: 'children'
            },
            // 默认选中的ID值数组
            defKeys:[],
            // 当前即将分配权限的角色id
            roleId: ''
        }
    },
    created() {  //获取所有列表数据
        this.getRolesList()
    },
    methods: {
        // 获取所有角色的列表
        async getRolesList() {
            const {data:res} = await this.$http.get('roles')
            if(res.meta.status !== 200) {
                return this.$message.console.error('获取角色列表失败！');
            }

            this.rolelist = res.data

            // console.log(this.rolelist)
        },
        // 根据ID删除对应的权限
        async removeRightById(role,rightId) {
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
            }).catch(err => err)
            if(confirmResult !== 'confirm') {
                return this.$message.info('取消了删除效果')
            }
            
            const {data:res} = await this.$http.delete(
                `roles${role.id}/rights/${rightId}`
            )
            if(res.meta.status !== 200) {
                return this.$message.error('删除权限失败')
            }

            // this.getRolesList()   不建议，会法神页面玩真渲染
            role.children = res.data
        },
        // 分配权限的对话框
        async showSetRightDialog(role) {
          this.roleId = role.id
          // 获取所有权限的数据
          const {data:res} = await this.$http.get('rights/tree')
          if(res.meta.status !== 200) {
            return this.$message.error('获取数据失败!')
          }
          // 把获取到的权限数据保存到data中
          this.rightslist = res.data
          console.log(this.rightslist)

          // 递归获取三级节点的ID
          this.getLeafKeys(role,this.defKeys)

          this.setRightDialogVisible = true
        },
        // 通过递归的形式获取角色下所有三级权限的id，并保存到defKeys数组中
        getLeafKeys(node,arr) {  //node节点判断是否为三级节点，arr数组保存
          if(!node.children) {
            // 如果当前节点不包含children属性，则是三级节点
            return arr.push(node.id)
          }

          node.children.forEach(item => this.getLeafKeys(item,arr))
        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed() {
          this.defKeys = []
        },
        // 点击为角色分配权限
        async allotRights() {
          const keys = [
            ...this.$refs.treeRef.getCheckedKeys(), //getCheckedKeys返回目前被选中的节点的 key 所组成的数组
            ...this.$refs.treeRef.getHalfCheckedKeys()//返回目前半选中的节点的 key 所组成的数组
          ]
          const idStr = keys.join(',')

          const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
          if(res.meta.status !== 200) {
            return this.$message.error('分配权限失败！')
          }
          
          this.$message.success('分配权限成功！')

          // 重新刷新列表
          this.getRolesList()
          // 隐藏对话框
          this.setRightDialogVisible = false
        }
    }
}

</script>

<style lang='less' scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>